Contour Positioning System - New Traveling Distance Estimation Method for Electric Vehicle

Abstract

Contour Positioning System (CPS) is a new system invented for electric vehicles to calculate the remaining battery capacity for reaching a desired destination. Instead of using conventional electric car estimation in terms of distance, a CPS system can figure out extra energy needed when an electric car is traveling on different contour lines. Extra current will be drawn for generating torque required by the electric car on an inclined plane, for instance traveling uphill. By using coordinate conversion, sets of longitude and latitude readings can be converted into distance difference along the pathway and the elevation levels difference are calculated; the extra force and torque needed along an inclined plane can be further counted which will then lead to the extra current drawn from the electric car's battery pack. Data collections and real-time validations have been done to clarify the calculation results. By performing a series of battery capacity calculation, CPS can give a higher precision and accuracy of remaining battery life to reach the desired location

Effectiveness Comparison of Range Estimator for Battery Electric Vehicles

“…Equation (3) includes the power consumed for accelerating, rolling resistance of the wheel, driving up and down slopes, and aerodynamic drag. CPS works by extracting road contour distance and elevation heights data from Google Earth's elevation profile and using them to produce the road contour slope angles [13]. The data obtained is used with (3) to provide an estimation of the amount of battery needed for the user's selected route.…”

Parameters Influencing on Electric Vehicle Range

“…Contour positioning system (CPS): Based on the current geographical location, the route parameters are taken to calculate the required force and torque for the route, and then the energy to be released from the battery is estimated [84,85].…”